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发明名称
ACCESSORY FOR USE WITH AN OVERHEAD PROJECTOR
摘要
申请公布号
GB2156096(B)
申请公布日期
1987.05.28
申请号
GB19850006726
申请日期
1985.03.15
申请人
WILFRED * LEVIN
发明人
WILFRED * LEVIN
分类号
G03B21/132;(IPC1-7):G03B21/132
主分类号
G03B21/132
代理机构
代理人
主权项
地址
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